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Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended											125 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009	Sep. 30, 2008	Sep. 30, 2007	Sep. 30, 2006	Sep. 30, 2005	Sep. 30, 2004	Sep. 30, 2003	Sep. 30, 2013
Income Tax Disclosure [Line Items]
Net book losses	$ (31,703,433)	$ (22,110,723)	$ (3,492,399)	$ (6,957,038)	$ (19,308,392)	$ (27,241,639)	$ (30,712,947)	$ (19,961,961)	$ (6,733,427)	$ (751,255)	$ (95,238)	$ (185,356,438)
Valuation allowance against deferred tax assets	100.00%
Gross federal net operating loss carry forwards	18,700,000	99,500,000										18,700,000
Gross state net operating loss carry forwards	32,600,000	77,400,000										32,600,000
Deferred tax assets	40,200,000											40,200,000
Interest and penalties	$ 0	$ 0										$ 0

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